A client is already created in testenv.New(), so we can just
as well use that one, instead of creating a new client.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This fix moves helper functions containerIsStopped and
containerIsInState to integration/internal/container,
so that they could be used outside of integration/container.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
